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(No Model.) 8

C.V A. MURRAY 8v R. SGHULTHEISS.

ENVELO'P.

' No. 598,608.. Patented Jan. 4, 1898.v

TH: normas Prrzns co. PHomL'uma.. wAsNmcroN, o. c.

'" UNITED STATES PATENT OEETCE.

CATHERINE A. MURRAY AND RUPERT SCI-IULTHEISS, OF INDIAN'APOLIS, lINDIANA.

ENVELOP`I SPECIFICATION forming part of Letters Patent No. 596,608,dated January 4, 1898.

Applicant nea nach 5, 1897.

EAY and RUPERT SoHULTHEIss, citizens of the United States, residing atIndianapolis, in

5 the county of Marion and State of Indiana,

have invented certain new and useful 1inprovements in Envelops; and Wedo declare. the following to be a full, clear, and exact de scription ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

Our invention relates to improvements in that class of envelops whichare constructed with a view of preventing them being opened Withoutbeing damaged to such an extent as to plainly show that 'they have beenopened,

and its novelty and advantages Will be fully understood from thefollowing description and claim when taken in conjunction with theaccompanying drawings, in which- Figure l is a plan view of the blankfrom which ourimproved envelop is formed. Fig. 2 is an elevation of therear side of the envelop when closed, and Fig. 3 is a transverse 25section taken in the line a: @c of Fig. 2.

In the said drawings similar letters designate corresponding parts inall of the views, referring to Which-- A indicates the rectangular bodyportion of the blank from which our improved envelop is formed.

B C indicate the end flaps, which are tapered or reduced in width towardtheir outer ends.

D indicates the bottom flap, which is gummed on'its inner side, asindicated by a, for its connection to the outer sides of the end iiaps BO and is provided at about the point shown with the slot or elongatedaperture b, and E indicates the top or closure iiap, which is gummed onits inner side, as indicatedl by c, for-its connection to the-outersides of the iiaps B C D and is provided With the tongue F,said tonguebeing also gummed, as indicated by d, and being designed to be bent atthe point indicated by dot-ted line e inwardly upon itself for a purposepresently described.

In forming our improved envelop from the blank described the end flaps BC are bent plane indicated by the Serial No. 626,099. (No modell.)

at the points indicated by dotted lines-inwardly upon the inner side ofthe body A, afterrwhich the bottom flap D is bent inwardly at the pointindicated by dotted line Yand is securely connected by the gum @,whichis previously moistened, to the outer sides of the said end flaps B C.The closure-flap E is now bent inwardly at the point indicated by dottedline, when the envelop is ready for use.

In using the envelop the letter or other matter to be carried thereby isplaced therein in the usual manner. The gum c on the closure-Hap E andthe gum d on the tongue E of said iiap are then moistened, and the flapis folded down upon the Iiaps D B C, the tongue F being inserted throughthe slot b of flap D so as to rest at the inner sides of the contiguousportions or inner ends of the flaps B C D, as shown in Figs. 2 and 3.Pressure is Vnow applied to the flap E to connect its gumined portion cto the outer side of the flap D and the gummed portion d of the tongue Eto the inner sides of the several iiaps B CD.

By virtue of the shape of the end flaps B C and the length of theinserted portion of the tongue F it Will be observed that when theenvelop is closed the said inserted portion of the tongue is connectedby the adhesive which it carries to the inner sides of the iiaps D, B,C, and E and serves to connect the said flaps together at the center ofthe envelop and to ma terially strengthen the envelop.

When closed in the manner described, there is absolutely no danger ofthe envelop opening casually and losing its contents, and it ispractically impossible to open such envelop Without mutilating the sameto such an eX- tent that the fact that it has been opened will beplainly indicated even to the casual observer. From this it will beappreciated that the envelop is well adapted forcarrying money andvaluable papers, as Well as confidential letters and the like.

As a further safeguard against the envelop being opened Withoutdetection by an unauthorized person We prefer to slit the edges of theseveral flaps B, C, D, and E at the points indicated by the letters f.In virtue of this Vprovision it will be observed that if a knife orsimilar instrument be introduced between the IOO inner flaps B C and theouter iiaps D E at any the outer and inner flap between the slit f andthe center of the envelop. Y

It will be observed that notwithstanding theadvantages possessed byourimproved envelop, as above pointed out, the-same embodies but aminimum amount of paper and is adapted to be made quite as easily as theordinary envelop.

Having thus described our invention, what we claim is- Theherein-described envelop formed in one piece and consisting essentiallyof the body- A, the imperforate end iiaps B, C, tapered or reduced inWidth toward their outer ends and bent .inwardly upon the body portionwith their inner ends resting closely adjacent to each other and thetransverse center of the envelop, the bottom nap D, bent upwardly f uponand connected by adhesive substance to the outer sides of the end flapsand having the elongated aperture b, at a point between the end flapsand below the contiguous ends thereof, and the top or closure flap E,bent downwardly upon and connected by adhesive substance to the end andbottom flaps and having the tongue F, bent at an intermediate point ofits length, so as to form a portion adapted to be inserted through theaperture b, of the bottom flap D; the said inserted portion beingprovided on its inner side with adhesive and being of sucha length as topermit of it being connected by the adhesive to the inner sides of thebottom, end and top iiaps, substantially as specified. Y

In testimony whereof we affix our signatures in presence of twowitnesses;

CATHERINE A. MURRAY.

Y RUPERT SOHULTHEISS.

Witnesses:

GEO. H. MEIKs,

ADDISON S. MAGAw.

